Uninterrupted power supply without power loss

ABSTRACT

An on-line UPS has radio frequency filter, rectifier filter, battery, detecting circuit, controlling circuit and trigger circuit, and its efficiency approximate a hundred percent. No matter what commercial power is failure, or its voltage is too high or too low, it is able to keep voltage output within normal range. When commercial power is abnormal, it supplies power with battery by automatic switchover, and its response time is zero millisecond. The structure of the present invention is simple and its operation is stable. It has removed the power converter of UPS on the condition that all necessary features are maintained. The costs, volume, weight and power loss decrease to a percent of conventional UPS of same power.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to an uninterrupted power supplywithout power loss.

[0003] 2. Background

[0004] No matter it is an alternate current (AC) uninterrupted powersupply (UPS) or a direct current (DC) uninterrupted power supply(UPS),it consists of a full power converter, which has two functions: one isto perform power conversion, and the other is to keep the voltageconstant. The said full power converter is a DC-AC power converter orAC-DC converter with a power handling capacity constantly bigger thanoutput power, while the deference between the power handling capacityand the output power depends on the specific efficiency. A conventionalalternate current uninterrupted power supply (AC-UPS) (a power inverter)employs complex circuit and technology to export a constant sine wavevoltage. The cost, volume, weight and power loss thereof is ninety ninepercent of that of the complete appliance, respectively. In fact, oncethe stable current of UPS is transmitted into a computer and itsperipheral, it is inversely converted, and the direct current voltage isrectified and filtered and then converted into the alternate currentvoltage. It is not the harmonics but the direct component of thealternate current voltage that the computer and its peripherals needtruly. Thus it is unnecessary to invert the direct current intoalternate current. At the same time, the harmonics of the alternatecurrent become a major real and latent threat to the computer and itsperipherals as well as an incipient fault of data security. Therefore,the optimum voltage for the computer and its peripherals is the directcurrent voltage. In addition, slow alteration of voltage with time doesnot produce any adverse effect on the operation stability of thecomputer and the peripherals. These appliances employ a regulated switchsupply inside and don need any constant service voltage. They can runstably and reliably within the normal range of commercial power.

[0005] A recent invention of UPS Without Inverter (ZL97241194.1) has notany inverter of a conventional AC-UPS. It has realized the supply ofdirect current to a computer and its peripherals; it has been a greatadvance. Although it does not need a full power converter, it needs acompensating voltage to keep the direct current voltage output constant.If the alternate current voltage output varies within 20% of the directcurrent voltage output, it needs a DC-DC power converter whose powerhandling capacity is 20% of the full power.

[0006] Mission of UPS is: to keep the voltage output withoutinterruption through supplying the power with battery in time byautomatic switchover, before the commercial power is failure and thedirect current voltage on the user appliance decrease to 75% of thepower rating (usually 20 millisecond); and to keep the voltage outputwithin the normal range when the voltage of commercial power is out ofthe normal range (too high or too low). Therefore, it is a necessaryfeature of UPS to keep the voltage output within the normal range, butit is a redundant feature to keep the voltage output constant.

[0007] Since the direct current power supply has significant advantagesover an alternate current power supply, it is an unnecessary move toperform power conversion; since the computer and the peripherals canwork stably and reliably within the normal range of commercial power, itis unnecessary to keep the voltage constant. It wastes ninety ninepercent of the resources in the manufacture process of the powerconverter and ninety nine percent of the energy in the process ofoperation. It is clearly a redundant part of the UPS. There are limitedresources on the earth. Energy is also in need. It is unnecessary toconsume ninety nine percent of the resources and energy any more for theredundant feature.

SUMMARY OF THE INVENTION

[0008] The present invention is intended to overcome the above-mentioneddisadvantages, and to remove the power inverter of a conventional UPSwhile at the same time keep the necessary features, and get rid of theredundant features to approximate an efficiency of a hundred percent andreduce the cost, volume and weight to one percent of the original one.

[0009] The aims of the present invention is realized through thefollowing program: the UPS has radio frequency filter, rectifier filterand battery; the rectifier filter employs semi-controlled bridgecircuit; after rectifier filter is the detecting circuit, controllingcircuit and trigger circuit. The semi-controlled rectifier bridge B1 isused for full-wave rectification and the direct current voltage outputthereof as well as the direct current voltage output of the battery aretransmitted directly into user appliances without any power conversion.

[0010] The direct current voltage output of the rectifier filter is sentout from Pin D4 of the diode. The direct current voltage output of thebattery is sent out directly from the silicon control SCR3. The voltagesof them are both around 300 volts and loaded on the output ports at thesame time. When commercial power is failure, or its voltage input islower than the set value (for example, 176 VAC), SCR3 is on state, andthe voltage of the battery is loaded on the output port in 40milliseconds (the conducting duration of the silicon control is no morethan 40 milliseconds). When the voltage input is higher than the setvalue (for example, 264 VAC), SCR1 and SCR2 is cut off, the rectifierfilter has no output, and thus the high voltage is cut off; at the sametine SCR3 is on state and the voltage of the battery is loaded on theoutput port. Therefore, the voltage output can always be kept at around300 volts no matter the commercial power is failure or its voltage istoo low or too high.

[0011] The uninterrupted power supply without power loss has thefollowing advantages:

[0012] 1. it has a power consumption commensurate with that of a PNjunction of a semiconductor. The overall efficiency of the completeappliance approximates a hundred percent. Thus it is an energy-savingproduct in the true sense.

[0013] 2. the cost, volume and weight decrease to a percent of those ofconventional UPS, respectively. It saves ninety nine percent of theresources. Thus it is truly an environmental protection product.

[0014] 3. it has no problem of frequency instability or harmonicinterference. With the uninterrupted power supply without power loss,the computer and its peripherals work more stably, and processing andtransmitting of data become more save and secure.

[0015] 4. it can employ natural wind cooling and does not need anyrotating heat sink since the heating effect of the complete appliance islow. Thus the dependability is significantly enhanced. Furthermore, noerror will happen to the complete appliance in the serviceable lifebecause it has reduced ninety nine percent of the parts of theappliance.

[0016] 5. simple design, easy manufacture and convenient generalization.

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the drawings which illustrate the best modes presentlycontemplated for carrying out the present invention:

[0018]FIG. 1 is a block diagram of an uninterrupted power supply withoutpower loss;

[0019]FIG. 2. is a main circuit diagram, including radio frequencyfilter, rectifier filter and battery;

[0020]FIG. 3 is a schematic diagram of detecting circuit;

[0021]FIG. 4 is a schematic diagram of controlling circuit; and

[0022]FIG. 5 is a schematic diagram of trigger circuit.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] With reference to the figures where like elements have been givenlike numerical designations to facilitate the reader's understanding ofthe present invention, and particularly with reference to the embodimentof the present invention illustrated in the attached figures, thepreferred embodiments of the present invention are set forth below.

[0024] In the block diagram of FIG. 1., a cleaned alternate voltage isobtained after the voltage input passes through radio frequency filter.After passing through the rectifier filter, the obtained voltage turnsinto a direct current voltage Vo that changes slowly with time, andsupplies the load current and the charge current at the meantime. Thedetecting circuit perceives various changes of the voltage input,voltage output and battery voltage, and then feed the information ofthese changes to the controlling circuit. The controlling circuitinterprets the information and then produces signals of status displayand aural warning and trigger, the trigger signal activates the siliconcontrol to control the on state and off state of voltage input Vi andbattery voltage E1 appropriately in time.

[0025] In the main circuit diagram of FIG. 2., the protector F1,capacitor C1, C2, C3, C4 and C5, and inducers ID1, ID2, and ID3constitute radio frequency filter. The diode D1 and D2 are connected inseries, the silicon control SCR1 and SCR2 are arranged in series, thebattery E1, electric resistor R1, and diode D3 are connected in series,and then the four series arms are installed in parallel, wherein each ofthe positive poles of D1, D2, SCR1 and SCR2 is upward; each of thepositive poles of D3, D4, E1 and C12 is downward; the positive pole andnegative pole is connected to the negative pole of C12 and the negativepole of E1, respectively; the first two series arms constitute thesemi-controlled rectifier bridge B1, and the voltage output of thecomplete appliance, Vo, is obtained from the two ports of C12 viaresistor R3 and protector F2; electronic resistor R4, silicon controlSCR4 and SCR5 are connected in series, the positive poles of SCR4 andSCR5 are upward, one end of R4 is connected to the positive pole of E1,and the negative pole of SCR5 is connected to the negative pole of E1;the positive pole and negative pole of the electrolytic capacitor C14are connected to the negative poles of SCR4 and C12, respectively. Thesemi-controlled rectifier bridge B1 and the other full-wave rectifierfilter bridge circuit composed of rectifier bridge B2, electrolyticcapacitor C13 and electric resistor R2 are both connected to the outputports of radio frequency filter. The detecting voltage VT is obtainedfrom the output ports of B2. The resistor R3 is connected to thenegative terminal of the output circuit and provides the current A0 tosample the voltage. In FIG. 2., there are four groups of detectingvoltage outputs: voltage outputs +V0, −V0; battery voltages +E0, −E0;current outputs +A0, −A0; and voltage inputs +VT, −VT.

[0026] The detecting circuit in FIG. 3 consists of six detectingchannels with identical structure. In the first channel, the positivepole of the light-emitting diode of the light electric coupler OPT1 isconnected to +VT through resistor R7, and the negative pole is connectedto T through the potentiometer W1, the emitter electrode of OPT1 triodeis connected to the base electrode of triode T1, the emitters of themare grounded though resistors R6 and R5 respectively, and the collectorelectrodes of them are all connected to +17 V; Pin 2 and Pin 6 of thecontrolling circuit U1 are connected to emitter electrode of the triodeT1 through resistors R8 and R9, and at the meantime are grounded throughpotentiometers W2 and W3, Pin 1 of U1 is grounded, Pin 5 is groundedthrough electric capacitor C6, Pin 4 and Pin 8 are connected to +5 V,and Pin 3 produces output signal VIH.

[0027] The second detecting channel is connected to signal VT, whichconsists of OPT2, T2, U2, W4, W5, W6, R10, R11, R12, R13, R14 and C7;the third detecting channel is connected to input signal V0, whichconsists of OPT3, T3, U3, W7, W8, W9, R15, R16, R17, R18, R19 and C8;the fourth detecting channel is connected to input signal A0, whichconsists of OPT4, T4, U4, W10, W11, W12, R20, R21, R22, R23, R24 and C9;the fifth detecting channel is connected to input signal E0, whichconsists of OPT5, T5, U5, W13, W14, W15, R25, R26, R27, R28, R29 andC10; the sixth detecting channel is connected to input signal E0, whichconsists of OPT6, T6, U6, W16, W17, W18, R30, R31, R32, R33, R34 andC11. The four signals of the detecting circuit from the main circuit,V0, E0, A0 and VT, produce six output signals: high input voltage VIH,low input voltage VIL, high output voltage VOH, high output amperageAOH, low electric potential of the battery EL and very low electricpotential of the battery ELL.

[0028] Model number of OPT1 is 4N26, wherein signals are inputted intothe light-emitting diode through R7 and W1. Some of the signals are highvoltage. Some of the signals are low voltage. Obtain different step-downvoltages of R1 and then regulate W1 to accommodate it to input signalsof different voltage classes and optimize the current of OPT1light-emifting diode. The triode T1 is 2SC733, which together with R4constitutes an emitter follower and produces the first-order currentamplification. Model number of the controlling circuit is NE555, whereinPin 2 and Pin 6 are connected to the emitter electrode of T1, and R8 andR9 are isolating resistors. The adjusting arm of W2 is positioned at aplace corresponding to the set value of voltage input Too High and theposition of the adjusting arm of W3 corresponds to the set value ofvoltage input Not High The output signal VIH can be adjusted to atransition point corresponding to the value between Too High and NotHigh by regulating W2 and W3. It can be leant from the input and outputlogic relationships that: the output signal is Active-Low when it is todetect the input signal oo High and the output signal is active-Highwhen it is to detect the input signal Too Low wherein VIH, VOH and AOHare all active-low and VIL, EL and Ell are all active-high.

[0029] Controlling circuit in FIG. 4 consists of U10A, U10B and U10C,two-input AND-NOT gates U11A and U11B, two-input NOR gate U12A,two-input AND gates U7A, U7B, U7C, U7D, U8A, U8B and U8C, and NOT gatesU9A, U9B, U9C and U9D, which produces five trigger signals TRIG1-TRIG5,and four signals controlling the illuminating status of indicator light:ok for the complete appliance ALLOK, battery discharging EON, normalinput voltage VOOK and normal voltage output VIOK, and one controlsignal to activate aural warning SPK1; and the logic equations toproduce the above-mentioned ten signals are:

TRIG1=TRIG2=!(!VIH#!VOH#!AOH);

TRIG3=TRIG4=EON=!(AOH#! VOH#! VIH& VIL#ELL);

TRIG5=!(VIH&!VIL#AOH&!ELL&VOH);

ALLOK=!(!AOH# VOH# VIL#! VIH# ELL# EL);

VOOK=!(!AOH#!VOH);

VIOK=!(!VIH#VIL);

SPK=!(!EL&!ELL).

[0030] Wherein the symbols used in the equations are stipulated by thelogic design language Abel. The circuit in FIG. 4 passed the third-ordersimulation of the Abel language, wherein the U7A and U7B are tworedundant gates that can reduce the time difference of signalsTRIG1-TRIG5 to reach the triggered silicon gate.

[0031] The switch supply SW1 provides the controlling voltage for thecomplete appliance, wherein the positive pole thereof is connected to+E0 through resistor R35, the negative pole thereof is connecteddirectly to 0, and an electrolytic capacitor C15 is connected betweenthe positive and negative pole. There are two groups of voltages on theinput port, +5 V and +17 V, with the common ground GND.

[0032] The trigger circuit in FIG. 5 consists of five groups of circuitswith identical structure, wherein each group has a +17V independentdirect current voltage provided by a switch supply and the positivepoles and the negative poles of those switch supplies are connected to+E0 and 0, respectively. For the first group of triggered siliconcontrol SCR1, the negative pole of the switch supply SW6 is connected tothe negative pole K of the silicon control SCR1, and the positive polethereof is connected to the collector electrode of the light electriccoupler OPT11 triode and the collector electrodes of the triodes T15 andT16; the negative pole of the OPT11 light-emitting diode is groundedthrough potentiometer W23, the positive pole thereof is connected tocontrol signal TRIG1 through resistor R55, the emitter electrode ofOPT11 triode and those of T15 and 16 are connected to the controlelectrode of silicon control SCR1 at the meantime through resistors R54,R53 and R52. The model number of OPT11 is 4N26. Change the triggercurrent flowing through SCR1 by regulating W23. The model numbers of thetriodes T15 and T16 are 2SC733 and 2SC5250, respectively. They togetherwith R53 and R 52 constitute an emitter follower to provide second-orderamplification of electric currents.

[0033] The second group of circuits consist of light electric couplerOPT10, triodes T13 and T14, potentiometer W22, resistors R8, R49, R50and R51, and switch supply SW5; the third group of circuits consist oflight electric coupler OPT9, triodes T11 and T12, potentiometer W21,resistors R44, R45, R46 and R47, and switch supply SW4; the fourth groupof circuits consist of light electric coupler OPT8, triodes T9 and T10,potentiometer W20, resistors R40, R41, R42 and R43, and switch supplySW3; the fifth group of circuits consist of light electric coupler OPT7,triodes T7 and T8, potentiometer W19, resistors R36, R37, R38 and R39,switch supply SW2.

[0034] The trigger circuits produces five groups of trigger signals:SCR1-G, SCR1-K, SCR2-G, SCR2-K, SCR3-G, SCR3-K, SCR4-G, SCR4-K, SCR5-G,SCR5-K; these signals trigger the silicon control SCR1-SCR5,respectively.

[0035] The working process of the present invention is as follows:

[0036] First, the silicon controls SCR1 and SCR2 that constitute thesemi-controlled rectifier bridge B1 in the FIG. 2 is always on statewhen commercial power is normal. Actually B1 is performing full-waverectification. The pulsating voltage VD outputted therefrom is filteredby C12 and then turns into a direct current voltage V0 and outputted. Atthe meantime VD charges the battery E1 through resistors R1 and D3. Theelectric potential of E1 is connected to the output port through SCR3.When everything is normal, the detecting circuit perceives VIH=1, VIL=0,AOH=1 and ELL=0. After these signals pass through the logic gates of thecontrolling circuit, the result is to get TRIG1 and TRIG2 that are high,and TRIG3, TRIG4 and TRIG5 that are low. Thus SCR1 and SCR2 are on stateand SCR3, SCR4 and SCR5 are off state, and the voltage on the outputport, V0, comes from the semi-controlled rectifier bridge B1.

[0037] Second, there are three cases when the electric potential of thebattery is normal and the output ports are short-circuited:

[0038] 1. When commercial power is failure, the detecting circuitperceives VIH=1, VIL=1, AOH=1, and ELL=0. After these signals passthrough the logic gates of the controlling circuit, the result is to getTRIG1, TRIG2, and TRIG3 that are high. SCR1 and SCR2 are off statebecause of no anode current. The commutating voltage VD equals zero.SCR3 is always on state during the period. The electric potential of thebattery E1 is loaded onto the output ports. After commercial powersupply restores service, VIL=0. After the signal passes through thelogic gates of the controlling circuits, the result is to get TRIG1 andTRIG2 that are high, and TRIG3 that is low, which is the same as thestatus before the power failure. At the moment when commercial powerrecovers, the direct current voltage V0 after being rectified andfiltered is bigger than the terminal potential of battery E1 while SCR3is off state because of reverse bias.

[0039] 2. When voltage of commercial power is too low, things aresimilar to those when commercial power is failure. What is different isthat SCR1 and SCR2 are on state and the commutating voltage VD doesnequal zero. Since SCR3 has been on state, on the positive pole of D4 isthe terminal potential of E1, which is higher than the commutatingvoltage VD on the negative pole of D4 and thus D4 becomes reversebiased. Thus the voltage on the output port comes from the E1. With theslow rise of the voltage of commercial power and the slow decrease ofthe discharge voltage of the battery, the voltages loaded on thepositive pole and the negative pole of D4 become very close to eachother. On a certain moment, D4 becomes forward biased, and then thecurrent output is provided by both V0 and E0 at the meantime. Whencommercial power supply is on normal service again, SCR becomes offstate because of reverse bias.

[0040] 3. When the voltage of commercial power is too high, thedetecting circuit perceives that VIH=0, VIL=0, AOH=1 and ELL=0. Afterpassing through the logic gates of the controlling circuit, the resultis to get TRIG1 and TRIG2 that are low, and TRIG3 that is high, andthere are no trigger signals on the controlling electrodes of SCR1 andSCR2. When alternate current voltage crosses zero, they areautomatically cut-off and thus the high voltage is cut off. During theprocess, SCR3 is always on state, and the electric potential of batteryE1 is loaded on the output ports. When commercial power is normal again,VIH=0, then the signal passes through the logic gates of the controllingcircuit and the result is to get TRIG1 and TRIG2 that are high, andTRIG3 that is low, and it returns to the original state.

[0041] Third, there are two cases when the electric potential of thebattery is normal and the output ports are short-circuited:

[0042] 1. When the alternate current voltage is accidentallyshort-circuited, the detecting circuit perceives that VIH=1, VIL=0,AOH=0 and ELL=0, these signals pass through the logic gates of thecontrolling circuit and then get TRIG1, TRIG2 and TRIG3 that are low.Thus SCR1, SCR2 and SCR3 are cut off, and the voltage on the outputport, V0, equals zero, so that the user appliance is protected. When theshort circuit is relieved, AOH=1 and it restores the original state.

[0043] 2. When the alternate current voltage is abnormal (the alternatecurrent is failure, too low or too high), it can be learnt from theabove that: before the short circuit happens, the electric potential ofthe battery is loaded to the output port through SCR3; and after theshort circuit happens, the detecting circuit detects that VIH=0 orVIL=1, AOH=0, and ELL=0, and then these signals pass through the logicgates of the controlling circuit to get TRIG1, TRIG2 and TRIG3, that arelow, and TRIG5 that is high. Therefore, SCR1 and SCR2 are off state andSCR5 is on state. Due to the on state of SCR5, SCR3 becomes off stateand the voltage on the output port V0 is cut off, so that the userappliance is protected. When the short circuit is relieved, AOH=1 and itreturns into the original state. Hereby, the process of off state ofSCR3 caused by the on state of SCR5 is the same as that happens when theelectric potential of the battery is too low.

[0044] Fourth, the electric potential of the battery is too low and theoutput port is short-circuited. When the alternate current voltage isabnormal (the alternate current is failure, too low or too high), SCR3is on state, the electric potential of the battery is connected to theoutput port. It can be learnt from the logic circuit in FIG. 4 thatTRIG4 and TRIG3 change synchronously and therefore when SCR3 is onstate, SCR4 is also on state, the potential of E1 charges the C14through the series arm of R4, SCR4, C14 and SCR3. When the chargingcurrent flowing through SCR4 is lower than its sustaining voltage, SCR4is automatically off state and at the moment the potential that has beencharged on C14 is commensurate to that of E1. When the failure ofcommercial power lasts too long and the discharge voltage of the batteryapproximates the warning voltage, ELL=1. After the signal passes throughthe logic gates of the controlling circuit, the result is to get TRIG5that is high, SCR5 is on state, and the positive potential on C14 isloaded on the negative pole of SCR3 through the forward direct currentresistor of SCR5. Therefore, SCR3 is cut off due to reverse bias, andthe battery stops discharging to prevent the damages due to overdischarging.

[0045] Fifth, charging and discharging of battery. The positive pole ofthe battery E1 and the positive pole of semi-controlled rectifier bridgeB1 are connected to each other, and the negative pole of E1 is connectedto the negative pole of the B1 through resistor R1 and diode D3. Thepositive poles of B1 and E1 are connected to the output port. Thenegative pole of B1 is connected to the output port through diode D4.The negative pole of E1 is connected to the output port through siliconcontrol SCR3. When commercial power is normal, B1 charges E1 through D3and R1. When E1 has just finished discharging, the terminal potential isrelatively low, the charging current is very high, and R1 acts as acurrent limiting resistor. At the moment, charging of E1 enters into thefast charging mode. When E1 is about to be fully charged, the chargingcurrent diminishes, and the voltage drop on R1 is so small that it hasno effect on the charging circuit. At the moment, charging of E1 entersinto the floating charge mode. Since the filter electrolytic capacitorC12 is connected to the left of D4 and there is no electronic capacitoron the left, the voltage wave on the left and that on the right of D4are different: on the left is a single side pulsating sine wave VD witha frequency of 100 Hz and an amplitude of 308 V, and on the right isdirect current voltage V0 that changes slowly with time. V0 fluctuateswith the magnitude of voltage input and the load, but the chargingvoltage VD of the battery remains basically the same and isapproximately equal to the amplitude of the alternate current voltage,which is mainly because the buffering action of D3, D4 and SCR3. Only ifcommercial power is not failure, E1 is always being charged and neverdischarges, and doesn fluctuate over time with the change of V0. Thus E1undergoes floating charge to a potential of 308 V or more than that andthe state is continuously maintained.

[0046] Sixth, some points of explanation:

[0047] 1. The aim of using a semi-controlled rectifier bridge is to cutoff the high voltage fast once the voltage of commercial power is toohigh. If use a conventional rectifier bridge, an additional siliconcontrol must be added apart from the rectifier bridge, and thus thepower loss thereof doubles.

[0048] 2. The SW1 in FIG. 4 and the SW2-6 in FIG. 5 are all low powerswitch supplies commercially available. Their power ratings are allwithin 10 W, and the powers of SW2-SW6 are slightly different, dependingon the trigger silicon control. For the micromidi uninterrupted powersupply without power loss with the overall power of the completeappliance lower than 50 KW, SW1-SW6 can be replaced by a switch supplywith six independent coils.

[0049] 3. When commercial power is out of normal range, SCR3 becomes onstate, and the electric potential of E1 is loaded onto the output port.At the moment, E1 undergoes free discharge. Apart from a 0.7 V voltagedrop on SCR3, there are no other power losses. Theefficiency=(308-0.7)/308=99.8%. The direct current voltage VD isdirectly outputted through diode D4 after rectification. Therefore, theabove equation of efficiency is also applicable to the case of normalcommercial power supply.

[0050] 4. The present invention keeps the necessary features of UPSentirely, while the main appliance is simple enough to have only severaldiodes and silicon controls, and get a 25 KW power output withrectifying parts of a current rating of 100 A. The efficacy correspondsto that of a 30 KVA conventional UPS.

[0051] While there is shown and described herein certain specificalternative forms of the invention, it will be readily apparent to thoseskilled in the art that the invention is not so limited, but issusceptible to various modifications and rearrangements in design andmaterials without departing from the spirit and scope of the invention.In particular, it should be noted that the present invention is subjectto modification with regard to the dimensional relationships set forthherein and modifications in assembly, materials, size, shape and use.

What is claimed is:
 1. An uninterrupted power supply without power losshaving radio frequency filter, rectifier filter, and battery,characterized by that the rectifier filter thereof employssemi-controlled bridge capacitor, and the detecting circuit, thecontrolling circuit and the trigger circuit are connected after therectifier filter.
 2. A power supply according to claim 1, characterizedby that the diodes D1 and D2 are connected in series, the siliconcontrol SCR1 and SCR2 are connected in series, the battery E1, resistorR1, electrolytic capacitor C12, and diode D4 are connected in series,and then the above four series arms are connected in parallel, whereinthe positive poles of D1, D2, SCR1 and SCR2 are downward and thepositive poles of D3, D4, E1 and C12 are upward; the positive pole andthe negative pole of SCR3 are connected to the negative pole of C12 andthe negative terminal of E1, respectively; and the first two series armsconstitute the semi-controlled rectifier bridge B1, and the overallvoltage output V0 of the complete appliance is obtained from the twoterminals of C12 through resistor R3 and protector F2; the resistor R4,silicon controls SCR4 and SCR5 are connected in series, the positivepoles of SCR4 and SCR5 are upward, one terminal of E1 is connected tothe positive pole of E1, the negative pole of SCR5 is connected to thenegative terminal of E1, and the positive pole and the negative pole ofthe electrolytic capacitor C14 are connected to the negative pole ofSCR4 and the negative pole of C12, respectively.
 3. A power supplyaccording to claim 1, characterized by that the detecting circuitcomprises six detecting channels with identical stricture, in the firstdetecting channel the positive pole of the light-emitting diode of thelight electric coupler OPT1 is connected to +VT through electricresistor R7 and the negative pole is connected to T throughpotentiometer W1, the emitter electrode of OPT1 triode and the baseelectrode of triode T1 is connected to each other, and their emitterelectrodes are grounded through resistor R6 and R5 respectively, and thecollector electrodes are all connected to +17 V; Pin 2 and Pin 6 of thecontrolling circuit U1 are connected to the emitter electrode of triodeT1 through resistors R8 and R9 respectively, and are at the meantimegrounded through potentiometers W2 and W3, Pin 1 of U1 is grounded, Pin5 of the electrolytic capacitor C6 is grounded, Pin 4 and Pin 8 areconnected to +5 V, and Pin 3 is connected to output signal VIH.
 4. Apower supply according to claim 1, characterized by that: thecontrolling circuit consists of three-input AND gates U10A, U10B andU10C, and two-input AND-NOT gates U11A and U11B, two-input NOR gateU12A, two-input AND gate U7A, U7B, U7C, U7D, U8A, U8B, and U8C, and NOTgates U9A, U9B, U9C, and U9D, which produces five trigger signalsTRIG1-TRIG5, and four control signals of illuminating status of theindicator lights: ok for complete appliance ALLOK, battery dischargingEON, normal voltage output VOOK, and normal voltage input VIOK, and onecontrol signal to trigger the aural warning SPK1; and the logicequations to produce these ten signals are as follows:TRIG1=TRIG2=!(!VIH#!VOH#!AOH);TRIG3=TRIG4=EON=!(AOH#! VOH#! VIH&VIL#ELL);TRIG5=!(VIH&!VIL#AOH&!ELL&VOH);ALLOK=!(!AOH# VOH# VIL#! VIH#ELL# EL);VOOK=!(!AOH#!VOH);VIOK=!(!VIH#VIL);SPK=!(!EL&!ELL).
 5. A powersupply according to claim 1, characterized by that the trigger circuitconsists of five groups of circuits with identical structure, whereinthe first group triggers silicon control SCR1, the switch supply SW6provides an independent voltage of +17 V for the group, the negativepole thereof is connected to the negative pole K of silicon controlSCR1, and the positive pole thereof is connected the collector electrodeof the light electric coupler OPP11 triode and the collectors of triodesT15 and T16; the negative pole of OPT11 light-emitting diode is groundedthrough potentiometer W23, the positive pole thereof is connected to thecontrol signal TRIG1 through resistor R55, the emitter electrode ofOPT11 triode and the emitter electrodes of T15 and T16 are connected toresistors R54, R53 and R52 and at the meantime connected to thecontrolling electrode G of silicon control SCR1.
 6. A power supplyaccording to claim 1, characterized by that the semi-controlledrectifier bridge is used for full-wave rectification, wherein the directcurrent voltage output and the direct current voltage of the battery isdirectly transmitted into user appliance without any power conversion.